Sub-pixel Rendering for Quadrangle Display Panels
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Solution Overview
Problem
Conventional display panels with rectangular sub-pixels face issues in image quality due to varying numbers of sub-pixels per gate wire, leading to inconsistent output voltage and current, and increased wire complexity, which deteriorates display image quality and increases power consumption.
Innovation Solution
A data rendering method and device that samples and filters input data for sub-pixels arranged in a quadrangle pattern with two red and two green sub-pixels in diagonal directions, allowing for overlapping rendering periods and reduced number of gate and source wires, thereby maintaining consistent sub-pixel connections and minimizing wire complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sub-pixels with triangle or rhombus shapes are used to improve image quality, then image quality is improved, but the arrangement of pixel circuits must be changed and wire complexity increases
Solution Approach 1:
The pixel array is segmented into multiple gate wires, with each gate wire driving a specific number of sub-pixels. This segmentation allows for systematic organization of the complex wire arrangement, reducing overall system complexity while maintaining the benefits of non-rectangular sub-pixel shapes for improved image quality.
Solution Approach 2:
Different gate wires are assigned different numbers of driven sub-pixels based on local requirements. This local quality approach allows optimization of image quality in different regions while managing wire complexity through differentiated connection schemes rather than uniform complex arrangements throughout.
2Productivity
If the number of gate wires is increased to drive more sub-pixels, then more sub-pixels can be driven, but output voltage and current become inconsistent and display image quality deteriorates
Solution Approach 1:
The patent ensures that each gate wire drives the same number of sub-pixels, creating equipotential conditions across all gate wires. This uniformity maintains consistent output voltage and current levels, preventing image quality deterioration while still achieving high productivity through optimized sub-pixel arrangements and overlapping rendering periods.
Solution Approach 2:
Overlapping rendering periods are implemented where multiple sub-pixels are rendered in alternating time periods. This periodic action allows more sub-pixels to be driven effectively while maintaining consistent electrical characteristics per gate wire, as each gate wire operates in a standardized periodic cycle.
3Ease of manufacture
If rectangular sub-pixels are used for simple pixel circuit implementation, then ease of manufacture is improved, but luminance and life-span are limited
Solution Approach 1:
The patent changes the shape parameter of sub-pixels from rectangular to non-rectangular forms (triangle, rhombus) to improve luminance and life-span characteristics. This parameter change enhances light emission efficiency while the systematic wire arrangement methodology maintains manufacturing feasibility through organized connection schemes.
Data Source
AI summary
A plurality of data signals to be supplied to a first pixel and a second pixel formed by a first sub-pixel, two second sub-pixels, and two third sub-pixels on the display panel are rendered. Input data corresponding to a first sampling window with respect to the second sub-pixel of the first pixel among the input data applied to the stripe pattern is used to render a second data signal supplied to the second sub-pixel through filtering sampled input data for a color of the second sub-pixel. The first data signal to be supplied to the first sub-pixel is rendered through filtering of the input data of a second window unit for a color of the first sub-pixel with respect to the first sub-pixel of the first pixel among the sampled input data.